Frequency tracking loop with wide pull‐in range for weak DSSS signal | Zendy

Guo Yichao | Zendy; Huan Hao | Zendy; Tao Ran | Zendy; Wang Yue | Zendy

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Frequency tracking loop with wide pull‐in range for weak DSSS signal

Author(s) -

Guo Yichao,

Huan Hao,

Tao Ran,

Wang Yue

Publication year - 2018

Publication title -

electronics letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.375

H-Index - 146

ISSN - 1350-911X

DOI - 10.1049/el.2018.6631

Subject(s) - direct sequence spread spectrum , loop (graph theory) , spread spectrum , signal (programming language) , phase locked loop , tracking (education) , range (aeronautics) , control theory (sociology) , computer science , electronic engineering , telecommunications , engineering , mathematics , code division multiple access , jitter , control (management) , artificial intelligence , combinatorics , programming language , psychology , pedagogy , aerospace engineering

A frequency tracking loop based on triangle function frequency discriminator and adaptive loop bandwidth adjustment is proposed to track the Doppler frequency of weak direct‐sequence spread spectrum (DSSS) signal. The proposed structure first provides a frequency discrimination with wide pull‐in range to lock the large residual frequency offset after acquisition. Then, the adaptive loop bandwidth adjustment is employed to improve the accuracy of frequency estimation. Compared with the conventional tracking loop, the proposed structure has wider pull‐in range and higher sensitivity. Simulation results verify the validity of the proposed method.

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